Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and the fourth letter-cluster is related to the third letter-cluster.

AZBZ : CYDY :: EXFX : GWHW :: IVJV : ?

KULU

Pattern followed is :

AZBZ : CYDY

A(1) + 2 = (3)C , Z(26) - 1 = (25)Y , B(2) + 2 = (4)D , Z(26) - 1 = (25)Y

EXFX : GWHW

E(5) + 2 = (7)G , X(24) - 1 = (23)W , F(6) + 2 = (8)H , X(24) - 1 = (23)W

Similarly,

IVJV : ?

I(9) + 2 = (11)K , V(22) - 1 = (21)U , J(10) + 2 = (12)L , V(22) - 1 = (21)U

KULU , is correct answer .